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Byrranga Mountains
The Byrranga Mountains (russian: го́ры Бырра́нга; ''Gory Byrranga'') are a mountain range in the middle of the Taymyr Peninsula, Siberia, Russia. Even though they were first explored in 1736, the Byrranga Mountains are one of the least known areas of the Arctic. The climate is continental and harsh, with frequent blizzards in the winter. This mountain range falls into the Krasnoyarsk Krai administrative division of the Russian Federation and is part of the Great Arctic State Nature Reserve, the largest nature reserve in Russia. However, the area is very remote, there is almost no population, and access is very difficult for the lack of roads and settlements. Geography They are located north and west of Lake Taymyr and running for about 1,100 km, forming a looping curve that runs roughly in a southwest to northeast direction. The name is from Nganasan бъранга 'bəranga'''large rocky mountain.' The range has deep canyons and ravines, as well as a few sma ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Taymyr Peninsula
The Taymyr Peninsula (russian: Таймырский полуостров, Taymyrsky poluostrov) is a peninsula in the Far North of Russia, in the Siberian Federal District, that forms the northernmost part of the mainland of Eurasia. Administratively it is part of the Krasnoyarsk Krai Federal subject of Russia. Geography The Taymyr Peninsula lies between the Yenisei Gulf of the Kara Sea and the Khatanga Gulf of the Laptev Sea. Lake Taymyr and the Byrranga Mountains are located within the vast Taymyr Peninsula. Cape Chelyuskin, the northernmost point of the Afro-Eurasian continent, is located at the northern end of the Taymyr Peninsula. Population The Nenets people, also known as ''Samoyeds'', are an indigenous people in northern arctic Russia, and some live at the Taymyr Peninsula. The Nganasan people are an indigenous Samoyedic people inhabiting central Siberia, including the Taymyr Peninsula. In the Russian Federation, they are recognized as being one of the Indigenous ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Nganasan Language
The Nganasan language (formerly called , ''tavgiysky'', or , ''tavgiysko-samoyedsky'' in Russian; from the ethnonym , ''tavgi'') is a moribund Samoyedic language spoken by the Nganasan people. In 2010 it was spoken by only 125 out of 860 Nganasan people in the southwestern and central parts of the Taymyr Peninsula. Classification Nganasan is the most divergent language of the Samoyedic branch of the Uralic language family (Janhunen 1998). There are two main dialects, Avam (, ) and Vadeyev (). A part of the vocabulary can be traced to elements of unknown substrate origin, which are roughly twice as common in Nganasan than in other Samoyedic languages like Nenets or Enets, and bear no apparent resemblance to the neighbouring Tungusic and Yukaghir languages. The source of this substrate remains a mystery so far.Eugene Helimski.Самодийская лингвистическая реконструкция и праистория самодийцев (in Russian) Phonology The lan ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Urstromtal
An ''urstromtal'' (plural: ''Urstromtäler'') is a type of broad glacial valley, for example, in northern Central Europe, that appeared during the ice ages, or individual glacial periods of an ice age, at the edge of the Scandinavian ice sheet and was formed by meltwaters that flowed more or less parallel to the ice margin. ''Urstromtäler'' are an element of the glacial series. The term is German and means "ancient stream valley". Although often translated as "glacial valley", it should not be confused with a valley carved out by a glacier. More accurately some sources call them "meltwater valleys" or "ice-marginal valleys". Emergence and structure Important for the emergence of the ''Urstromtäler'' is the fact that the general lie of the land on the North German Plain and in Poland slopes down from south to north. Thus the ice sheet that advanced from Scandinavia flowed into a rising terrain. The meltwaters could therefore only flow for a short distance southwards over the sa ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Limestone
Limestone ( calcium carbonate ) is a type of carbonate sedimentary rock which is the main source of the material lime. It is composed mostly of the minerals calcite and aragonite, which are different crystal forms of . Limestone forms when these minerals precipitate out of water containing dissolved calcium. This can take place through both biological and nonbiological processes, though biological processes, such as the accumulation of corals and shells in the sea, have likely been more important for the last 540 million years. Limestone often contains fossils which provide scientists with information on ancient environments and on the evolution of life. About 20% to 25% of sedimentary rock is carbonate rock, and most of this is limestone. The remaining carbonate rock is mostly dolomite, a closely related rock, which contains a high percentage of the mineral dolomite, . ''Magnesian limestone'' is an obsolete and poorly-defined term used variously for dolomite, for limes ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Siltstones
Siltstone, also known as aleurolite, is a clastic sedimentary rock that is composed mostly of silt. It is a form of mudrock with a low clay mineral content, which can be distinguished from shale by its lack of fissility.Blatt ''et al.'' 1980, pp.381-382 Although its permeability and porosity is relatively low, siltstone is sometimes a tight gas reservoir rock, an unconventional reservoir for natural gas that requires hydraulic fracturing for economic gas production. Siltstone was prized in ancient Egypt for manufacturing statuary and cosmetic palettes. The siltstone quarried at Wadi Hammamat was a hard, fine-grained siltstone that resisted flaking and was almost ideal for such uses. Description There is not complete agreement on the definition of siltstone. One definition is that siltstone is mudrock (clastic sedimentary rock containing at least 50% clay and silt) in which at least 2/3 of the clay and silt fraction is composed of silt-sized particles. Silt is defined as gr ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Operational Navigation Chart B-3, 2nd Edition
An operational definition specifies concrete, replicable procedures designed to represent a construct. In the words of American psychologist S.S. Stevens (1935), "An operation is the performance which we execute in order to make known a concept." For example, an operational definition of "fear" (the construct) often includes measurable physiologic responses that occur in response to a perceived threat. Thus, "fear" might be operationally defined as specified changes in heart rate, galvanic skin response, pupil dilation, and blood pressure. Overview An operational definition is designed to model or represent a concept or theoretical definition, also known as a construct. Scientists should describe the operations (procedures, actions, or processes) that define the concept with enough specificity such that other investigators can replicate their research. Operational definitions are also used to define system states in terms of a specific, publicly accessible process of preparation ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Marsh
A marsh is a wetland that is dominated by herbaceous rather than woody plant species.Keddy, P.A. 2010. Wetland Ecology: Principles and Conservation (2nd edition). Cambridge University Press, Cambridge, UK. 497 p Marshes can often be found at the edges of lakes and streams, where they form a transition between the aquatic and terrestrial ecosystems. They are often dominated by grasses, rushes or reeds. If woody plants are present they tend to be low-growing shrubs, and the marsh is sometimes called a carr. This form of vegetation is what differentiates marshes from other types of wetland such as swamps, which are dominated by trees, and mires, which are wetlands that have accumulated deposits of acidic peat. Marshes provide habitats for many kinds of invertebrates, fish, amphibians, waterfowl and aquatic mammals. This biological productivity means that marshes contain 0.1% of global sequestered terrestrial carbon. Moreover, they have an outsized influence on climate resi ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Tundra
In physical geography, tundra () is a type of biome where tree growth is hindered by frigid temperatures and short growing seasons. The term ''tundra'' comes through Russian (') from the Kildin Sámi word (') meaning "uplands", "treeless mountain tract". There are three regions and associated types of tundra: Arctic tundra, alpine tundra, and Antarctic tundra. Tundra vegetation is composed of dwarf shrubs, sedges, grasses, mosses, and lichens. Scattered trees grow in some tundra regions. The ecotone (or ecological boundary region) between the tundra and the forest is known as the tree line or timberline. The tundra soil is rich in nitrogen and phosphorus. The soil also contains large amounts of biomass and decomposed biomass that has been stored as methane and carbon dioxide in the permafrost, making the tundra soil a carbon sink. As global warming heats the ecosystem and causes soil thawing, the permafrost carbon cycle accelerates and releases much of these soil-contained g ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Taymyr River
The Taymyra (russian: Таймыра) is a river in Krasnoyarsk Krai, Russia. It is located in the middle of the Taymyr Peninsula. It is about long and has a drainage basin of . The Taymyra is the most northerly river system of its size or greater, the largest river whose basin is wholly north of the , and also the largest with a basin lying entirely above the polar . [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Chetyrekh River
The Chetyrekh is a river in Krasnoyarsk Krai, Russia. Its source is in the Byrranga Mountains. It flows across tundra regions into the Staritsa, a branch of the Pyasina that discharges into the Pyasina Bay of the Kara Sea north of the main mouth of the Pyasina. It is long, and has a drainage basin of . The Chetyrekh freezes up in late September—early October and stays under the ice until June. Formerly this river was known as Dolgiy Brod River, but its name was changed after the 1917 Russian Revolution. References *William Barr William Pelham Barr (born May 23, 1950) is an American attorney who served as the 77th and 85th United States attorney general in the administrations of Presidents George H. W. Bush and Donald Trump. Born and raised in New York City, Barr ..., ''The Last Journey of Peter Tessem and Paul Knutsen, 1919''. Rivers of Krasnoyarsk Krai Tributaries of the Pyasina {{Russia-river-stub ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Khutudabiga River
The Khutudabiga (russian: Хутудабига) Federal Service for Geodesy and Cartography of Russia, 1999, p. 419 is a in , |
Glacier
A glacier (; ) is a persistent body of dense ice that is constantly moving under its own weight. A glacier forms where the accumulation of snow exceeds its Ablation#Glaciology, ablation over many years, often Century, centuries. It acquires distinguishing features, such as Crevasse, crevasses and Serac, seracs, as it slowly flows and deforms under stresses induced by its weight. As it moves, it abrades rock and debris from its substrate to create landforms such as cirques, moraines, or fjords. Although a glacier may flow into a body of water, it forms only on land and is distinct from the much thinner sea ice and lake ice that form on the surface of bodies of water. On Earth, 99% of glacial ice is contained within vast ice sheets (also known as "continental glaciers") in the polar regions, but glaciers may be found in mountain ranges on every continent other than the Australian mainland, including Oceania's high-latitude oceanic island countries such as New Zealand. Between lati ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
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